Equity of Host Inc. and Capital of Host L.P. - Components of Capital (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Limited Partners Capital Account [Line Items]
Net Income (Loss)	$ 210		$ 256	$ 497	$ 372
Dividends declared on common stock	(107)		(43)	(194)	(65)
Repurchase of common OP units				(50)
Distributions to non-controlling interests	(1)			(1)
Other comprehensive income/(loss)	3		(5)	5	2
Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Other comprehensive income/(loss)	3		(5)	5	2
Non-controlling Interests
Limited Partners Capital Account [Line Items]
Net Income (Loss)	1		(1)	1
Distributions to non-controlling interests	(1)			(1)
HOST HOTELS & RESORTS L.P.
Limited Partners Capital Account [Line Items]
Beginning Balance	6,863	$ 6,715	6,525	6,715	6,446
Net Income (Loss)	213		261	504	378
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	8		12	4	(3)
Repurchase of common OP units				(50)
Distributions declared on common OP units	(107)		(43)	(194)	(65)
Distributions to non-controlling interests	(1)			(1)
Changes in ownership and other			38		24
Other comprehensive income/(loss)	3		(5)	5	2
Ending Balance	6,977	6,863	6,782	6,977	6,782
HOST HOTELS & RESORTS L.P. | General Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	1	1	1	1	1
Ending Balance	1	1	1	1	1
HOST HOTELS & RESORTS L.P. | Limited Partner
Limited Partners Capital Account [Line Items]
Beginning Balance	6,930	6,784	6,588	6,784	6,516
Net Income (Loss)	210		256	497	372
Issuance of common OP units to Host Inc. for comprehensive stock plans, net	8		12	4	3
Repurchase of common OP units				(50)
Distributions declared on common OP units	(107)		(43)	(194)	(65)
Changes in ownership and other			37		24
Ending Balance	7,041	6,930	6,850	7,041	6,850
HOST HOTELS & RESORTS L.P. | Total Capital
Limited Partners Capital Account [Line Items]
Net Income (Loss)	211		255	498	372
HOST HOTELS & RESORTS L.P. | Accumulated Other Comprehensive Income (Loss)
Limited Partners Capital Account [Line Items]
Beginning Balance	(73)	(75)	(69)	(75)	(76)
Other comprehensive income/(loss)	3		(5)	5	2
Ending Balance	(70)	(73)	(74)	(70)	(74)
HOST HOTELS & RESORTS L.P. | Non-controlling Interests
Limited Partners Capital Account [Line Items]
Beginning Balance	5	5	5	5	5
Net Income (Loss)	1		(1)	1
Distributions to non-controlling interests	(1)			(1)
Changes in ownership and other			1
Ending Balance	5	5	5	5	5
HOST HOTELS & RESORTS L.P. | Limited partnership interests of third parties
Limited Partners Capital Account [Line Items]
Beginning Balance	167	164	203	164	126
Net Income (Loss)	3		5	7	6
Distributions declared on common OP units	(2)		(1)	(3)	(1)
Common OP unit issuances					56
Changes in ownership and other			(44)		(24)
Ending Balance	$ 168	$ 167	$ 163	$ 168	$ 163